E-Bike Guide: What to Know Before Buying Used

E-bikes have become a popular choice for commuters and families in Denmark — but a used e-bike requires checking some things that aren't relevant for a regular bike. Here's what to know before you buy.

1. The battery is the most important thing to check

The battery is the most expensive component on an e-bike, and its condition matters more for the price and value than the bike's condition itself.

Ask the seller about:

• The battery's age — most batteries last 3-5 years with normal use
• Number of charge cycles, if readable (some systems show this in an app or on the display)
• Actual range today compared to the originally specified range — a significant drop is a warning sign
• Storage conditions — batteries stored properly (not in extreme cold or heat) typically last longer

Tip: Ask to see the battery charge or the bike ride a stretch on motor power before buying — it confirms the system actually works.

2. Know the difference between motor types

• Hub motor (front or rear wheel): Simple, cheaper to repair, but can give a less natural riding feel
• Mid-drive motor: Positioned at the pedals, provides better balance and a more natural feel, typically on slightly pricier models

Neither type is "wrong" — it depends on what you prioritize and what you're used to.

3. Check the electronics, not just the mechanics

In addition to the usual checklist for used bikes (frame, brakes, tires, gears), for an e-bike you should also:

• Turn on the system and check that the display works correctly
• Test all assist levels (eco, normal, sport/turbo, if applicable)
• Listen for unusual noises from the motor while riding
• Check that the charger is included and physically fits the bike's port

4. Understand range realistically

The range stated by the manufacturer is often measured under ideal conditions. Real-world range is affected by:

• Your weight and any cargo
• Terrain (hills significantly reduce range)
• Assist level (higher level = shorter range)
• Battery age (older batteries have lower actual capacity than when new)

Expect the real-world range on a used e-bike to often be 10-30% lower than the original manufacturer's stated figure, depending on battery age.

5. Price: what's reasonable for a used e-bike?

E-bikes often depreciate faster than regular bikes, primarily due to battery aging. As a rule of thumb:

• 1-2 years old: 60-75% of original price
• 2-4 years old: 40-60% of original price
• 4+ years old: Assess based on the battery's specific condition more than age alone

Always check what used e-bikes are currently selling for on PedalSwap to get a realistic picture of the current market price.

6. Spare parts and service

Before buying, it's worth checking:

• Whether the brand/model is still serviced by bike shops in Denmark
• Whether spare parts (especially the battery, if it eventually needs replacing) are still available
• This is especially important for lesser-known or older brands

Ready to find your e-bike?

Now that you know what to look for, you can browse all used e-bikes on PedalSwap and filter by price, condition, and location — direct from private sellers across Denmark.